diff --git a/m-algo.h b/m-algo.h
index 0f1c8cae..db6a0a67 100644
--- a/m-algo.h
+++ b/m-algo.h
@@ -334,7 +334,8 @@
 
 //TODO: const_iterator missing...
 //TODO: Algorithm missing
-// nth_element, average, find_if, count_if, ...
+// nth_element ( http://softwareengineering.stackexchange.com/questions/284767/kth-selection-routine-floyd-algorithm-489 )
+//, average, find_if, count_if, ...
 
 #define ALGOI_MAP(container, cont_oplist, func) do {                    \
     for M_EACH(item, container, cont_oplist) {                          \